Interlock mechanism for elevators.



J. s. MUGKLE.

INTERLOGK MEGHANISM FOR ELEVATORS.

APPLICATION FILED JULY 19,1909. 957,702 Patented May 10,1910.

SETS-SHEET 2- UNITED STATES PATENT OFFICE.

JOHN S. MUCKLE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 STANDARD ELE-VATOR INTERLOCK COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORA- TIONOF PENNSYLVANIA.

INTERLOOK MECHANISM FOR ELEVATORS.

oamoe.

Specification of Letters Patent.

Patented May it), 1910.

To all whom it may concern:

Be it known that 1, JOHN S. MUoKLii, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Interlock Mechanism for Elevators, of which thefollowing is a specification.

The object of my invention is to construct interlock mechanism for usein elevators of the type in which a hand cable or rope is used toactuate the controlling mechanism for starting and stopping the reversing gear; the mechanism being so constructed that the landing doorscannot be moved from the platform until the door at that particularplatform is closed.

In the accompanying drawings z-AFigure l, is a vertical sectional viewof an elevator well illustrating my improved mechanism; Fig. 2, is asectional view through the elevator well and a side View of a portion ofthe car; Fig. 8, is a sectional view on the line 3-3, Fig. a; Fig. l, isa sectional view on the line 4e l, Fig. 2; Fig. 5, is a sectional viewon the line 5-5, Fig. 2; and Figs. 6 and 7, are views illustratingdetails of my invention.

A, A are the walls of the elevator well.

a, a are the landing floors.

B is the interlock mechanism located at each landing floor; beingsecured to the walls of the elevator well in any suitable manner.

D is the elevator car and this car carries on its underside the otherpart of the interlocking mechanism.

0 is the hand cable or rope which, in the present instance, passesthrough a tubular shield O on the car D. This hand cable is connected tothe valves or other controlling mechanism either at the base or at thehead of the elevator well. In the present construction the valveoperating mechanism is at the base of the well and the cable passes overtwo sprocket wheels 0, c at the head of the well; the cable at thispoint being in the form of a chain so as to engage the sprocketwheel 0to insure its turning as the cable is moved in either direction.

On the shaft O carrying the sprocket wheel 0 is a sprocket wheel 6around which passes the controlling cable 6. This cable also has a chainsection. where it passes around the wheel so as to insure its movingwith the wheel. On one strand of the cable 6 is secured a cam E, whichis tapered at each end 6 as shown in Figs. 2 and 7 there being one ofthese cams at each landing door. The cams E are connected by links 6 tobrackets E secured to the elevator well so that when the cable 6 ismoved vertically the cams will be moved into and out of operativeposition with the mechanism on the elevator car. The other strand ofthecable 6 is attached to a slide F adapted to slideways g on aframe Gsecured to the wall of the elevator well. These slideways in the presentinstance are in the form of round bars and carried by the slide are twotransverse rods f on which is mounted a sliding toothed plate F. Theteeth of this plate are so shaped as to be engaged by the teeth 2' of abracket I secured to the underside of the car D, and illustrated indetail in Fig. 6, so that when the teeth of the bracket and the teeth ofthe sliding plate are in engagement any movement of the car will betransferred to the cable 0 through the toothed bracket I and the toothedplate F, and as the cable 6 is geared to the controlling mechanism 0through the sprocket wheels at the head of the elevator well this motionwill be communicated to the valve mechanism, consequently the car willbe al ways maintained at the landing, as any drop in the car willoperate the valve mechanism so as to bring it back to position.

H is the landing door closing the entrance to the elevator well. Thisdoor has at one corner a hooked bar it with which engages a latch Kpivoted at In to the frame G. A spring 70 tends to force the latch outand into engagement with the hooked bar h. This latch when in its normalposition engages the hooked bar h and prevents the door being openeduntil the car is at the landing.

In order to push the latch back clear of the hooked bar it, I provide aslide N mounted in ways on the underside of the car floor D. This slidehas a roller 72 which is adapted to press against the latch K when movedforward. Pivoted to the underside of the car at mis a lever M whichprojects beyond the edge of the car, as shown in Fig. 4, so as to beacted upon by the shifting cam E. On the end of the lever is a roller mwhich travels on the cam E. On the slide N is a pin 11. which enters aslot in the lever M so that any movement of the lever will be impartedto the slide. WVhen the cam E is shifted clear of the roller m then thelever M and the slide N will not be actuated.

In order to return the slide N after it is free of the control of thecam E, I provide a lever N, which is pivoted at n One arm of this leveris connected by a link N to the slide N and the other arm is weighted,as clearly shown in Fig. 2.

S is a weighted lever pivoted at s to the frame G and one arm of thislever is connected by a link 8 to a pin 5 on the sliding toothed plateF. This arm of the lever is in line with the depending bar 77. carriedby the door H and the weight 8 is sufficient to move the sliding plateto position in line with the toothed bracket I when the lever isreleased on the opening of the door. ll hen the door is closed thedepending bar pushes the lever S and moves the plate out of line withthe toothed bracket I on the car D.

The operation is as follows :INhen the car is in motion then the cam Eis out of the path of the end of the lever M carried by the car, and asthe door is closed the parts on the elevator well and those on the carare out of line so that the mechanism will not be operated. lVhen a caris stopped at a landing the movement of the cable will cause, the cam Eto be shifted into the path of the lever M on the car and as the carnears the landing the roller on will slide upon the cam E, moving thelever IWI out and with it the slide N and this slide will push back thelatch K and release the door. The moment the door is released and openedthe weighted lever S is released and will move the sliding, toothedplate F into engagement with the toothed bracket I on the car. Thismovement couples the cable 6 with the controlling cable 0, so that anymovement up or down of the car will be transferred to the operatingcable 0 and this movement will operate the controlling valves to returnthe car to its normal position with its floor in line with the floor ofthe landing, so that any leakage in the valve mechanism will notinterfere with the proper alinement of the car floor with the landing.Moreover, the toothed bracket on the car prevents the movement of thecontroller rope 0 while the landing door is open, as the cable 6 isconnected to the controller cable 0 through the mechanism at the head ofthe elevator well. As soon as the door is closed the depending bar hforces the sliding toothed plate F out of engagement with the toothedbracket I, thus freeing the car D from the control of the toothed plateF, and as the controller rope is operated to start the car in eitherdirection it will shift the cam E out of the path of the lever M, at thesame time the lever and the slide N will be withdrawn by the weightedlever .L This will release the latch K, which will engage the hooked barit and this will prevent the opening of the door until the car is againbrought to a stop at the landing.

I claim l. The combination in interlocking mechanism for elevators, of acar, a landing, a door at said landing, a latch by which the door islocked in a closed position, means on the car for actuating the latch, acontrolling cable, a cam cable extending throughout the well, said camcable being connected to the controlling cable, a movable cam on saidcam cable for operating the latch actuating means, and means forpositively connecting the car with the cam cable when the car is atrest.

2. The combination in interlocking mechanism for elevators, of alanding, a car, a controlling cable for actuating the controllingmechanism of the car, a second cable, a cam connected to said secondcable adapted to be thrown into and out of action when said cable ismoved in either direction, a slide on the body of the car, a lever onthe car engaging the slide and arranged to be actuated by said cam whenin position, a latch on the elevator well actuated by the slide, alanding door locked by the latch, and means for positively coupling thecam cable to the car when the landing door is open.

8. The combination in interlocking mechanism for elevators, of alanding, a door closing the landing, a latch on the elevator well forlocking the door in a closed position, a car means on the car foractuating the latch, a controlling cable extending throughout the well,a cam mounted in the well, a cable attached to said cam and alsoextending throughout the well, means connecting the cam cable with thecontrolling cable so that when the controlling cable is moved to stopthe car the cam will be shifted into position to move the latchactuating mechanism of the car.

I. The combination in interlocking mechanism for elevators, of alanding, a landing door, a latch in the elevator well for locking thedoor in its closed position, a car means on the car for actuating thelatch, a controller for stopping and starting the car, a cam pivoted tothe side of the elevator well, a cable connected to the cam and to thecontrolling mechanism of the car, a toothed bracket on the car, atoothed plate on the wall of the elevator Well, and means whereby thetwo elements can be thrown into and out of engagement on the opening orclosing of the door, said toothed plate being connected to the cable towhich the cam is attached.

5. In interlocking mechanism for elevators, the combination of alanding, a landing door, a latch for locking the door in its closedposition, a car means on the car for actuating the latch, a controllerfor stopping and starting the car, a cam on the side of the elevatorwell, a cable connected to the cam so that on the movement of the cablethe cam will be moved into and out of posi tion to enga e the actuatingmechanism on the car, a slide on the elevator well to which the cable isalso attached, a sliding toothed plate carried by the slide, a toothedbracket on the car arranged to be engaged by the sliding plate, andmeans on the door for moving the plate into and out of position, thesaid cable being connected to the con trolling mechanism so that anymovement of the car after it is broughtto the landing will be impartedtothe controlling mechanism so that the floor of the car will be in linewith the landing.

6. The combination in interlocking mechanism for elevators, of alanding, a landing door, a latch for locking the landing door in itsclosed position, a car, latch operating mechanism on the car, acontrolling cable, a cam pivoted to the side of the elevator well, acable connected to the cam, the two cables being connected together atthe head of the elevator well, a toothed bracket on the car, a carrierattached to the cable which is conr-ected to the cam, a sliding toothedplate on the carrier adapted to be moved into engagementwith the toothedbracket on the car, a weighted lever connected to the toothed plate, andmeans on the door for actuating the lever to shift the plate out ofengagement with the toothed bracket when the door closed.

7. The combination in interlocking mech anism for elevators, of a seriesof landings, a door at each landing, a car, a hand cable extendingthrough the elevator well and connected to the controlling mechanism ofthe car, a cam pivoted to the side of the elevator well at each landing,a cable attached to the several cams and connected to the controllingcable, a latch on the wall of the elevator well at each door and adaptedto lock the door when in its closed position,

I a slide on the car, a roller carried by the l slide adapted to pressagainst the latch and release the door, a weighted lever connected tothe slide, a pivoted arm also connected to the slide and adapted to beactuated by one of the cams when said cams are moved into position, atoothed bracket on the car, guides at each landing, slides adapted tomove vertically on the guides, each slide being connected to the camcable, a toothed plate mounted to move transversely on each slide and toengage the toothed bracket on the car when the car is at the landing, aweighted lever connected to said sliding plate, and an arm on the dooradapted to strike said lever and shift the plate when the door is movedto the closed position.

8. The combination in interlocking mechanism for elevators, of a seriesof landings, a door at each landing, a plate secured to the elevatorwell at each landing, a spring latch pivoted to each plate and adaptedto engage and lock the landing door when said door is closed, verticalguides on each plate, a slide adapted to the guides, a cam pivoted tothe wall. of the elevator well at each landing, a cable connecting theseveral cams and the several slides, a wheel around which the cablepasses, a car, a controlling cable connected to the controllingmechanism of the car, a wheel around which the said cable passes, saidwheel being mounted on the same shaft as the wheel of the cam cable sothat one cable will move with the other, transverse guides on eachslide, a toothed plate mounted on each of the transverse guides, atoothed member on the car adapted to be engaged by the toothed plate,means on the car engaged by the cam for operating the latch, and meanson the door for moving the plate out of line with the toothed member onthe car when the door is-closed.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses. I

JOHN S. MUOKLE. lVitnesses 7M. E. Snore, l "WM. A. BARR.

